A dynamic site refers to a website that generates and delivers content dynamically in response to user requests and interactions. Unlike static sites, dynamic sites use server-side processing, scripting languages, and databases to generate and display content on the fly, allowing for more interactive and personalized user experiences.

Key characteristics of dynamic sites include:

1. Server-Side Processing: Dynamic sites rely on server-side scripting languages such as PHP, Python, Ruby, or JavaScript (Node.js) to handle user requests and generate content dynamically. These scripts can access databases, perform calculations, interact with APIs, and process user inputs to generate customized responses.

2. Content Management Systems (CMS): Many dynamic sites are built using CMS platforms such as WordPress, Drupal, or Joomla, which provide frameworks and tools for creating, managing, and organizing content. CMSs allow non-technical users to update and modify website content through an administrative interface.

3. Personalization and User Interaction: Dynamic sites can tailor content and functionality based on user preferences, authentication status, or previous interactions. They can display personalized recommendations, user-specific data, and interactive forms, and enable features like user registration, comments, and social media integration.

4. Real-Time Updates: Dynamic sites can display real-time information by pulling and updating content from external sources, such as news feeds, social media streams, or live data from APIs. This enables users to access the latest information without requiring manual updates.

5. Database Integration: Dynamic sites often integrate with databases, allowing for efficient storage, retrieval, and management of structured data. This enables dynamic content generation, data-driven functionalities, and the ability to store user information, such as user profiles, orders, or preferences.

Dynamic sites are commonly used for e-commerce platforms, social networking sites, news websites, web applications, and any website that requires frequent content updates, user interaction, or real-time data integration.

It's worth noting that modern web development often involves a combination of static and dynamic elements. Static site generators and content delivery networks (CDNs) are often used to improve performance and scalability, while dynamic features and functionalities are incorporated where needed to enhance the user experience.